Investigators in northwest Arkansas were working to determine whether a device strapped to a 73-year-old woman who says she was forced to try to rob a bank was a bomb.

Fayetteville Police Sgt. Craig Stout said Tuesday that nothing was detonated after a bomb squad removed the device from Betty Davis's leg.

But authorities have not yet released the bomb squad's conclusion.

Davis told police a man was holding her and her husband, Herbert Davis, captive in their home, and that the man forced her to try to rob a bank Monday. Once at the bank, Davis told employees about the potential bomb and authorities evacuated the building.